package com.cdshop.web;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class EncodingFilter implements Filter {

	public static final String INIT_PARAM_CHARSET = "charset";

	private String charset;

	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		arg0.setCharacterEncoding(charset);
		arg2.doFilter(arg0, arg1);
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		charset = arg0.getInitParameter(INIT_PARAM_CHARSET);
		if (charset == null)
			charset = "UTF-8";
	}

}
